Troubleshooting - Goodwe ET Series User Manual

4. OTHER
4.1 Error messages and troubleshooting
The error messages shown below will be displayed on the PV Master app or reported by e-mail if an error occurs.
ERROR MESSAGE
Utility Phase Failure
Utility lose
VAC Failure
FAC Failure
PV/BAT Over
Voltage
Over Temperature
Isolation Failure
Ground Failure
Relay Check Failure
DC Injection High
EEPROM R/W
Failure
SPI Failure
DC BusHigh
Back-Up Over Load

Troubleshooting

Check Before Turning On AC Power
•
Battery connection: Check the connection between the ET inverter and the battery: the
polarity (+ / -) must not be reversed, see picture 28.
•
PV input connection: Check the connection between the ET inverter and the photovoltaic
panels: the polarity (+ / -) must not be reversed, see picture 29.
•
On-Grid and Back-Up Connection: Check the "On-Grid" connection to the distribution
network and the Back-Up connection of the outlet: check (L1/L2/L3 / N) that they are not
overlapped, see picture 30
•
Connecting the Smart Meter and the CT: Make sure the CT is connected in the correct
direction between the house and the grid (House-Grid) (picture 31).
EXPLANATION REASON
On-Grid Phase Shift Error The inverter has detected that the phase
angles of L2 and L3 are reversed
The distribution network The inverter cannot detect a connection to
is not available (loss of the grid
power or network
connection failed).
The mains voltage is not The inverter has detected that the AC voltage
within the permissible is beyond the normal range required for
range. safety in the country of use.
The network frequency is The inverter has detected that the grid
not within the permissible frequency is beyond the normal range
range. required for safety in the country
The total voltage of the PV The total voltage (open-circuit voltage) of
string or battery is too each PV string is higher than the maximum
high. DC input voltage of the inverter or the
battery voltage is higher than the maximum
BAT input voltage of the inverter
The inverter temperature The inverter's working environment has led
is too high. to a high-temperature condition
The insulation resistance An insulation fault can be caused by many
of the PV string is too low. reasons such as:
The PV panels are not well grounded, the DC
cable is broken, the PV panels are aging, the
environment is too humid, etc.
The leakage current is too A ground failure can be due to multiple
high. causes such as the neutral cable on the AC
side is not connected well or the ambient
humidity is relatively high, etc.
Relay auto check failed The neutral and ground cables are not
connected well on the AC side or this may be
an occasional failure
/ The inverter has detected a high DC
component in the AC output
/ This is caused by a strong external magnetic
field, etc.
Internal communication This is caused by a strong external magnetic
error field, etc.
The bus voltage is too high /
The back-up output is The total backup load power is greater than
overloaded the nominal backup output power
SOLUTIONS
The L2 and L3 cables are connected in reverse order.
1. Check (use a multimeter) to see if the AC side has any
voltage present. Make sure that grid power is available.
2. Make sure that the AC cables are connected tightly.
3. If all appears to be working well, please turn off the AC
breaker and turn it on again in 5 mins.
1. Make sure the safety country of the inverter is set
correctly.
Check (use a multimeter) if the AC voltage (between L and N)
is within the normal range (also on the AC breaker side)
a. If the AC voltage is high, make sure that the AC cable
complies with the requirements stated in the User Manual
and that the AC cable is not too long.
b. If the voltage is low, make sure the AC cable is connected
well and that the jacket of the AC cable is not compressed
into the AC terminal. 3. Make sure that the grid voltage in
your area is stable and is within the normal range.
1. Make sure the safety country of the inverter is set
correctly.
2. If the safety country setting is correct, please check the
inverter display to see if the AC frequency (Fac) is within the
normal range.
3. If an FAC failure only occurs a few times and is resolved
quickly, this condition could be caused by occasional grid-
frequency instability.
Check the voltage of the VOC FV string to see if it is lower
than the maximum input voltage of the inverter. If the VOC
FV string is high, connect the panels so that the VOC voltage
is the same, or less than the maximum DC input voltage of
the inverter.
1. Attempt to decrease the ambient temperature.
2. Make sure that the installation complies with the
instructions in the inverter User Manual.
3. Attempt to shut down the inverter for 15 mins and then
start it up again.
Use a multimeter to check that the resistance between
ground and the inverter case is zero. If not, connect the
inverter to ground.
High humidity can cause problems with insulation resistance.
Check the insulation resistance between PV1+/PV2+/BAT
+/BAT -/ PV- and ground, if the resistance is less than 33.33
kohm, check the connections in the system Restart the
inverter and check if the fault still occurs, if not, it is single
error.
Check (use a multimeter) if there is a measurable voltage (it
should normally be close to 0 V) between the earth and the
inverter frame. If there is a measurable voltage, this means
the neutral and ground cables are not connected well on the
AC side. If this happens only in the early morning, at dawn, or
on rainy days with higher humidity and recovers quickly, this
may be a normal situation.
Check (use a multimeter) if there is high voltage (which
should normally be less than 10 V) between the N and PE
cables on the AC side. If the voltage is greater than 10 V, this
means the neutral and ground cables are not connected well
on the AC side or it may be necessary to restart the inverter.
Try restarting the inverter, check if the error is still indicated,
if not, it means it is only an occasional situation.
Try restarting the inverter, check if the error is still indicated,
if not, it means it is only an occasional situation.
Try restarting the inverter, check if the error is still indicated,
if not, it means it is only an occasional situation.
Try restarting the inverter, check if the error is still indicated,
if not, it means it is only an occasional situation.
Decrease the backup loads to make sure the total load power
is lower than nominal backup output power